Lock for the adjustable backs of loose-leafed ledgers



`^ No. 749,992. PATEN-TED JAN. 19,1904'.

Y* u A. D. HULQUIST. A

LOCK FOR THE ADJUSTABLE BAOKS OF LOOSE LEAFED LEDGERS, ACCOUNT BOOKS, RECORD BOOKS, FILES, &o.

APPLIOATION IILED JUNE 6, 1,903.

H0 MODEL. Y

UNITED STATES Patented January 19, 1904.` Y

PATENT OFFICEQ' ANDREW D. HULQIIIST, oF CHICAGO, ILLINOIS, AssIGNoR. To J. s.

MCDONAIJD, OF CHICAGO, ILLINOIS.

, LocKA FOR THE ADJUSIABLE BACKS oFfL-os,E-LEAFED L EDGERS. AccuNT-BooKs, REcoR'DBooKs,

. ,FlLEs, se.,

" srEcIFrcATIoN running,,partpfl Letters Patent N9. 749,992, dated January 19, 1904.

f Application filed JuneflQOS.. Serial No.` l160,402. (No model.)

Be it known thatI, ANDREW D. HULQUIsT, a

To all whom it may concern/.1, l

A, citizen of the United States, anda resident of Chicago, in the county of Cook'and State of I or unlock the same by resting the book' on one side or the other and compressingthe same. This I accomplished by the means hereinafter fully described and as particularly pointed out in the claims. l

In the drawings, Figure 1 is a perspective View of the lock detached from the clampingplates of the back of the book. Fig. 2 is a longitudinal central section through the same and the clamping-plates to which the parts thereof are attached, showing the same locked. Fig. 3 is a similar view showing the position of the parts of the lock when' the boolcisareversed and the same unlocked.; iF ig. 4; 'is a longitudinal central section lof the lock detached from the clamping-plates and illus# trating a modified construction of the bolt.

Referring to the drawings, A and lB repre.- sent the clamping-plates ofthe back of the book, to which the coversAand B' are exibly connected in any suitable@ manner. VSecured rigidly to the clampingfplate Azin. Aany suitable manner is a bolt- C, WhichV projects atright angles therefrom toward v,the opposing clamping-plate B and is preferably cylindrical throughout its entirelength. Near the unsecured end of this bolt the sides thereof are provided with elongated pockets c, which are preferably arranged or disposed oblique to the axis of the bolt. These pockets are preferably shallowest near the adjacent extremity-of the bolt and gradually increase in ,depth-fas they extend therefrom. There may lbs one or more of these pockets a, and each is provided with a loose ball b, of steel'or other suitable material, which is free to move in said pocket.

Rigidly secured to the clamping-plate B is a tube D, which projects at right angles there- :plate A is uppermost the gravity of the ball causes it to move to the lower limitfof the pocket a and bywwedging itselfv between the ybolt'andthe grooved inner circumference of the tube effectually locks and prevents the further separation of the tube and bolt. When the plate B, to which the tube D is secured, is

I uppermost, the gravity of the ball causes it to of the tube and bolt. v

In Fig. 4 ofthe drawings I show a slightlymodified construction of the bolt E and the :tube In thismodiiication the bolt is secured.; in 'any suitable manner to the clampingplate A, -and the tube is rigidly secured to the 'clamping-plate B `in any suitable. manner.

, The vbore or inner wall f of the tube is corrugated-'or grooved in a manner similar to tube Dof ytheflock .hereinbefore described, and the edges :gof the unsecured end are anged injunction with the head of this modified form of bolt aball L, of steel or other suitable material, which is capable of movement in every direction. This ball /L is placed between said head G and the bore or inner Wall of the tube F, Which latter only slightly exceeds the diameter of the base of the ange of the head. Thus When the plate A, to which the bolt is secured, is uppermost ball la will gravitate down the inclined 'sides of the conical-shaped head G and entering one of said corrugations will lock the bolt E, so as to prevent the further separation'of the bolt and tube and the clamping-plates to which they are attached. When the plate B is uppermost and said clamping-plates are pressed together to release the ball It, it will gravitate toward the apex of the conical sides of the head and in this position will be unable to lock or interfere with the free separation of the tube and the bolt, which will only be limited by the base of the head G coming in contact with the flanged edges g of the end of the tube F.

It is obvious that the principal parts of my invention, as hereinbefore described, may be changed or modified in construction Without departing from the spirit of my invention.

All such modifications not involving a departure from the principle of the lock, as hereinbefore described, I desire to be understood as contemplating Within the scope of my invention.

The covers A' and B may, if desired, be dispensed with and the lock, With the clampingplates, be used for other purposes than clamping the removable leaves of books, ledgers, &c.

What I claim as new, and desire to secure by Letters Patent, isn

1. A lock comprising .clamping-plates; a bolt rigidly secured to and projecting from one of said plates; a tube secured to the other plate into which said bolt enters, the surface of the inner Wall ofvhich is uneven; and an independent gravity-controlled device interposed between said bolt and tube for automatically locking the same together when in one position and unlocking them when in the reverse position.

2. A lock comprising clamping-plates; a bolt rigidly secured to and projecting from one of said plates and provided with a longitudinally-disposed pocket in its unsecured end; a tube secured to the other plate into which said bolt enters, the surface of the inner wall of which is uneven; and an independent gravity-controlled ball seated in said pocket for automatically locking the tube and bolt together when in one positionand unlocking them when in the reverse position. v

3. A lock comprising clamping-plates; a bolt rigidly secured to and projecting from one of said plates and provided with a longitudinally-disposed pocket in its unsecured end which increases in depth as it extends from the adjacent extremity of said bolt; and a tube secured to the other plate into which said bolt enters, the/surface of the inner Wall of which is uneven; and an independent gravity-controlled ball seated in said pocket for automatically locking the tube and bolt together when in one position and unlocking lthem when in the reverse position.

4. A lock comprising clamping-plates; a bolt rigidly secured to and projecting from one of said plates and provided with a longitudinally-disposed pocket in its unsecured end arranged oblique to the axis of said bolt; a tube secured to the other plate into which said bolt enters, the surface of the inner Wall of which is uneven; and an independent gravity- 'controlled ball seated in said pocket for automatically locking the tube and bolt together when in one position and unlocking them when in the reverse position.

5. A lock comprising clamping-plates; a bolt rigidly secured to and projecting from one of said plates and provided with a longitu dinally-disposed pocket in its unsecured end arranged oblique to the axis of said bolt and increasing in depth as it extends from the adjacent extremity of said bolt; a tube secured to the other plate into which said bolt enters, the surface of the inner Wall of which is uneven; Vand an independent gravity-controlled ball seated in said pocket for automatically locking the tube and bolt together when in one position and unlocking them when in the reverse position.

6. A lock comprising clamping-plates; a bolt rigidly secured to and projecting from one of said plates; a tube secured to the other plate into which said bolt enters, the surface n of the inner Wall of which is circumferentially grooved; and' an independent gravity -controlled device interposed between said bolt and tube for automatically locking thc same together when in one position and unlocking them when in the reverse position.

7 A lock comprising clampingplates; a bolt rigidly secured to and projecting from. one of said plates; a tube secured to the other plate into which said bolt enters, the surface of the inner Wall of which 4is provided with a spiral groove; and an independent gravitycontrolled device interposed between said bolt and tube for automatically locking the same together when in one position and unlocking them when in the reverse position.

8. A lock comprising clamping plates; a bolt rigidly secured to and projecting from one of said plates and provided With a longitudinally-disposed pocket in its unsecured end; a tube secured to the other plate into which said bolt enters, the surface of the inner Wall 0f which is provided with a spiral groove; and an independent gravity-controlled ball seated in said pocket for automatically locking the tube and bolt together when in one position and unlocking' them when in the reverse position.

IOO

IIO

9. Al lock comprising clampingfplates; a bolt rigidly secured to and projecting from one of said plates and provided with a longitudinally-disposed ypocket in its unsecured end which increases in depth as it extends from the adjacent extremity of said bolt; a' tube secured to the other plate into Which said bolt enters, the surface of the inner Wall of which is provided With a spiral groove; and an independent gravity-controlled ball seated in said pocket for automatically locking the tube and bolt together When in one position and unlocking them when in the reverse position.

10. A lock comprising clamping-plates; a bolt rigidly secured to and projecting from one of said plates and provided With a longitudinally-disposed pocket in its unsecured end arranged oblique to the axis of said bolt; a tube secured to the other plate into which said bolt enters, the surface of the inner Wall of which is provided With a spiral groove; and an independent gravity-controlled ball seated4 in said pocket for automatically locking. the

one lof said plates and provided with a longitudinally-disposed pocket in its unsecured end arranged oblique to the axis of said bolt and increasing in depth as it extends from the ad jacent extremity to said bolt; a tube secured to the other plate into Which said bolt enters; the surface of the inner Wall of which is provided With a spiral groove; and an independent gravity controlled ball seated in said pocket for-automatically locking the tube and bolt together when in one position and unlocking them when in the reverse position.

In testimony whereof I have hereunto set Y my hand this 11th day of May, 1903.

ANDREW D. HULQUIST. Witnesses:

E. K. LUNDY, FRANK D. THoMAsoN. 

